机构地区: 广西民族大学化学与生态工程学院
出 处: 《广西民族大学学报(自然科学版)》 2010年第4期82-85,共4页
摘 要: 该文以氯化锌和吡啶-3-乙酸为原料采用水热法合成一种尚未见报道的配位聚合物,并通过元素分析、红外(IR)、单晶X射线、热重分析(TGA)对其进行了表征.单晶X射线分析结果表明:晶体结构中有一个独立的锌原子,来自两给吡啶环的氮原子[Zn-N=2.172(8)],两个羧基的氧原子[Zn-O=2.089(1)]和两个水的氧原子[Zn-O=2.129(8)]与其配位.该结构通过桥联配体吡啶-3-乙酸的作用得到了一个二维层状结构,且该结构中存在着配位水的氢与羧基氧之间形成的氢键,同时,相邻的层状结构之间通过微弱的C-H…O氢键向三维空间拓展. A coordination polymer containing divalent Zinc and 3-pyridylacetic acid(HL) has been obtained by hydrothermal synthesis and characterized by element alanalysis,IR and X-ray crystallography.The X-ray crystallography indicates that ZnⅡ ion is coordinated by two pyridyl N atoms[Zn-N = 2.172(8) ],two carboxylate O atoms [Zn-O = 2.089(1) ] and two water molecules[Zn-O = 2.129(8) ].This complex,Zn(L)2(H2O)2,displays two-dimensional layers via bridging 3-pyridylcarboxylate ligands in the unit.Adjacent two-dimensional layers are connected by hydrogen bonding between aquo ligands and unligated carboxylate oxygen atoms.Meanwhile,weak interlayer hydrogen bonding(C-H…O) is observed,assembling into the pseudo three-dimensional structure.